Ultra-Wide, Ultra-Sharp, and Ultra-Pricey: Sony 12-24mm F2.8 GM Review

The Sony 12-24mm f4 has been a staple in the camera bags of landscape shooters for a while, and so it should be, it's a great lens, but there has been a clamoring for a faster G Master version. If you're a photographer who has a need for speed, you'll be pleased to know that your wait for a faster, ultra-wide-angle lens from Sony is over because the Sony 12-24mm f2.8 GM is finally here. It joins at a time when others such as Sigma and Tamron, have already released their fast ultra-wides. However...